Ceiling unit



FIG. 1 is a is a front perspective view of a ceiling unit showing ournew design, the rear being plain and unornamented, the pattern beingrepetitive as in FIG. 1 of the drawing disclosure, and the ceiling unitbeing of a conventional thickness; and,

FIG. 2 is a front elevational view showing one tile from the ceilingunit in greater detail.

The ornamental design for a ceiling unit, as shown and described.